I opened up another tab to Udi Dahan's blog, at which point my PC came to a screeching halt.  After finally getting the task manager open I noticed FireFox was using 1.5GB of RAM.  Wow!  IE never uses that much memory - in fact IE usually crashes well before it ever gets that much memory consumed.  Here's a look at my memory usage after I killed FireFox, note the huge drop in the Physical Memory Usage History (blue line).